True story.
Once I got a scam call. They left me a voice mail. I waited until they called again and I recognized the number.
I answered the phone in a loud authoritative voice:
“Blair County Sheriffs office, Fraud Division, who is this?! This number has been linked to illegal telecommunication activity. Do not hang up or you will be impeding a law enforcement investigation and committing the crime of Obstruction of Justice! Who and where are you?!”
I kept them on the line for a good thirty seconds while they stammered and mumbled. Then they hung up. Never heard from them again. It was fun.
Gosh that response is so funny and useful.